Tool for applying granular material



April 14, 1942.`

H. W. HUDSON TOOL FOR APPLYING GRANULAR MATERIAL Filed Nov. 25, 1938Patented Apr. 14, 1942 UNITED STATES PATENT GFFICE 2,279,621 j 1 i TooLFORAPPLYING GRANULAR MATERIAL Herbert W. Hudson, Columbus, OhioApplication November 25, 1938, serial No. 242,148

7 Claims;

This Vinvention relates to the art of reconditioning worn compositionroofs, such as that described in my copending application Serial No.

194,261 filed March '7, 1938,in which a relatively thin coating of abituminous compound is applied to the roof and a layer of granulatedmineral material afterward forcibly embedded therein.

speeineany, this invention is directed te aA device for applying thegranulated mineral matter, the primary object being the provision of asimple tool which forcibly lings or impels the particles into the softcoating on the roof.

An object also resides in the provision of an elongated receptacle forthe mineral particles which can be held in the operators hands and willbe provided with a motor driven impellerr in the outer end to forciblyexpel the particles from the tool in a direction controlled by theoperator.

A further objectl rests in constructing the impeller from soft flexiblerubberto increase the effectiveness of its operation and decrease thewear resulting from engagement with the granulated minerals.

It is a still further object to provide the tool with a guide wall whichis mounted for adjustment toward and away from the impeller to adapt thetool to mineral particles of various sizes, the passage between thereceptacle and the impeller chamber being subject to variation in sizefor the same reason.

Another object rests in providing a movable gate between the mineralreceptacle and the impeller chamber to prevent the loss of theY Fig. 1is a perspective view of a tool formed in accordance with the presentinvention;

Fig. 2 is a vertical longitudinal sectional View taken through theforward end of the tool shown in Fig. 1;

Fig. 3 is a vertical transverse sectional viewtaken through the forwardend of the tool on o the plane indicated by the line IIL-III of Fig. 2.Referring more particularly to.. the drawing, it will be noted that thetool is formed to include an elongated hollow body I formed of sheetmetal or other suitable material. The rear end of the body I is providedwith a removable cap 2, the removal of which will permit the insertionof the granular mineral matter to be applied by the tool. At the forwardend, the body I is connected to a housing 3 in which is formed aIchamber 4. The housing is preferably formed from a metallic casting andis open at one side i to allow the mechanism which is disposed in thechamber to be installed.: The housing is provided ai; Vits lower portionwith a false guide wall 5, the forward end of which is bent downwardlyaround the lower edge of the discharge opening 5 of the housing. At itsrear end, the wall 5l includes a plurality of slots through which screws'I extend, the threaded portions of the screws being received withinsimilarly threaded openings in the lower wall of the housing. f Thehousing also includes an intermediate wall 8, the under surface of whichextends from the .upper edge of the discharge opening 6 rearwardly andupwardly, the rear portion of the wall curving downwardly to meet ailexible strip 9 secured atone end to an insert block I0. i

The strip 9 is also curved to conform substantially to the path ofmovement of an impeller II rotatably positioned in the chamber. Thelower free end of the-strip! terminates in spaced relation from the wall5 and means are provided to adjust this spacing'to vary the size of theinlet to the chamber from the body I. This adjustment permits the toolto be adapted to mineral patricles of various sizes. The inlet to thechamber 4 may be closed by a'slidable gate I2 carried with an inner wall`I3 ofthe housing. A fiat spring I4 engages the'gate I2 to yieldablyresist movement thereof. The upper end of the gate extends through aslot inthe top wall of the housing and is equipped with a ring I5, orother suitable handle, to provide for the movement ofthe gate by theoperator ofthe tool;` The gate will be maintained infany of itspositions of adjustment by 'reason of` the for'c applied by the springI4. i i

To rotatably support the impeller I I, the hous-A ing is provided with atransversely extending shaft I6 constituting an extension of thearmature shaft of an electric motor I'I. The latter member is secured tothe exterior wall yofA the housing by means of screws I8."'The impelleris composed of resilient material such as soft rub-A ber and has asleeve I9 molded fthereto. The sleeve is provided with fins .2U Ytopreventits rotation within the impeller. 'Ihe internal'bore of thesleeve is threaded in order that it may be secured to the similarlythreaded portion of the shaft I6. I

Current is supplied to the motor I'Iv through a conduit 2| carriedwiththe body I. A toggle-y switch 22 is positioned'in the line '2|within convenient reach of the operator. When the switch is actuated,the motor' will revolve, im-

parting similar movement tothe impeller which" l will revolve in thedirection indicated bygth'e arrow in Fig. 2. The ends of the impellerblade nearest the guide wall 5 move in a direction from the inlet to thechamber toward the outlet. When the gate I2 is opened and the forwardend of the tool lowered sufficiently to permit the granules in thebodyto move into the chamber, the impeller willr strike the granules andforce them through the outlet opening 6. I'he direction of movement ofthe granules is controlled by the operator merely by pointing the toolin the direction desired.

To further adapt the tool to granules of various sizes, the guide wall 5is formed of spring material and has a threaded boss 23 secured to itsunder side. The inner end of a set screw 24 is positioned in the bossand adjustment of the screw will move the wall toward or away from theimpeller. By moving the wall toward the impeller, the tool will beladapted to mineral particles of small size and compensation made forwear. The strip 9 is adjusted to vary the size, of the inlet to thechamber by means of a second set screw 25` carried` by the insert blockI0. The housing 3 is formed to include an opening 26 through which ascrew driver may be inserted to adjust the screw 25. The open side ofthey housing is closed by a removable wall 21.

InV use, the operator holds the body l with the forward` or housingcarrying end in the direction in whichY it is desired to discharge themineral particles. By reason of. the length of the body, the operatormay service a large arear of the roof without moving from his positionnIn the event a smaller tool is desired. for work in close places, thebody l may be removed and a shorter body substituted.

The tool above described is characterized by its simplicity andconvenience of operation.

As shown in Fig. 1, the body is preferably bent downward a shortdistance from the front end to enable the operator to direct the streamof granules against the roof at an angle of approximately 90 withoutrequiring the tool to be held at such an angle. This feature alsoenables the ready application of the particles to small. portions of theroof when the operator cannot conveniently stand, such as where the endof the ridge of a roof iscut oir at an angle.

What I believe to be new and desire to secure by Letters Patent is setforth in the following claims:

1. A device of the character described comprising an elongatedl magazinefor receiving granular material, said magazine serving yas a 'handle forthe device, a chamber provided at one end of said magazine, said chamberbeing provided with an entrance from said magazine and an outlet to theexterior, a motor driven impeller disposed in said chamber. between saidoutletfand said entrance, and a guide wall plate adjustable relativelyto the impeller to regulate the size of the space between the impellerand plate through which the granular material is fed, and means foradjusting saidplate.

2. A device of they character described comprising an elongated magazinefor receiving granular material, a chamber provided at one end of saidmagazine, said chamber being provided with an entrance from saidmagazine and an outlet to the exterior, means for varying the size ofsaid entrance, la motor driven impeller disposed in said chamber betweensaid outlet and said entrance, a radially adjustable guide wall 3. Adevice of the character described come prising a magazine for thereception of granular material, a chamber in communication with saidmagazine, agate disposed between said magazine and chamber forcontrolling the ow of material from the former to the latter, a shaftextending transversely of said chamber, means connected with said shaftfor imparting rotary movement thereto, an impeller positioned in saidchamber and secured for rotation with said shaft, said chamber beingformed with an outlet in one wall, and plate means having a sectionthereof unattached to said chamber to allow movement therebetween andmeans to move said plate to or from the impeller for regulating thewidth of the space between the impeller and an adjacent wall of thechamber.

4. In a device of the character described, a

housing provided witha chamber having an inlet and an outlet, a'guidewall movably supported within said chamber and extending from said inletto said outlet, a shaft extending transversely of said chamber, meansfor imparting rotary movement to said shaft, an impeller blade disposedin said chamber and secured for rotation with said shaft, the ends. ofsaid blade nearest said guide wall moving in a direction from the inlettoward the outlet upon rotation of said shaft, and means for moving saidguide wall toward and away from said impeller.

5. A device of the character described comprisingY an elongated magazinefor receiving granular material and serving as a handle for the device,a housing carried by the forward end of said magazine, said housinghaving a chamber formed therein in open communication with saidmagazine, said chamber also being provided with an outlet, a motordriven impeller journaled within said chamber between said outlet andsaid magazine, a bottom wall adjustably supported within said housingfor movement relative to said impeller, means for adjusting said wall,and gate means for controlling the movement of material from saidmagazine to said chamber.

6. A device of the character described comprising a housing providedwitha substantially circular chamber and an inlet and outlet therefor, ashaft extending transversely of said chamber, a rubber impeller rigidlysecured to said shaft for rotation therewith, a wall extending from theinlet to the outlet and secured at its ends to said housing, and meansfor adjusting adjacent the impeller, means for adjusting said a portionof said wall relative. to said impeller.

7 A device of the character described comprising a housing open at itsends, an upper wall extending into said housing from one edge of the`opening at one end, said wall terminating at its inner end in an arcuateportion, a curved flexible wall member secured at one end in saidhousing and constituting a continuation of the curved portion of saidupper wall, a shaft extending transversely of said chamber, a resilientimpeller fixed for rotation with said shaft, the ends of the blades ofsaid impeller terminating in limited spaced vrelation from said curvedwalls, a bottom wall extending between the openings at ther ends of saidhousing and secured at its ends thereto, said bfttom wall being spacedfrom the free end of saidxcurved flexible wall, and means for adjusting'said bottom wall with respect to said impeller and the free end of saidcurved wall with respect to said bottom wall.

HERBERT W. HUDSON.

